<?php

/*
	SQLite database wrapper class.

	By default, foreign keys are enabled and the database is in WAL mode. In general
	these defaults should be perfect for most use cases.
 */

class Database
{
    private PDO $c;
    private int $queries = 0;
    private array $log = [];
    private string $error = '';
	private float $time = 0;

    public function __construct(string $path, array $opts = [])
    {
        $opts = !empty($opts) ? $opts : [
            PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
            PDO::ATTR_DEFAULT_FETCH_MODE => PDO::FETCH_ASSOC,
        ];

        try {
            $this->c = new PDO("sqlite:$path", null, null, $opts);
            $this->c->exec('PRAGMA foreign_keys = ON;'); // Enable foreign keys
            $this->c->exec('PRAGMA journal_mode = WAL;'); // Enable WAL
        } catch (PDOException $e) {
            $this->error = "Failed to open database: " . $e->getMessage();
            throw $e;
        }
    }

	public function do(string $query, array $params = []): PDOStatement|false
	{
		$start = microtime(true);

		try {
			$stmt = $this->c->prepare($query);
			$stmt->execute($params);
			$this->record($query, $start);
			return $stmt;
		} catch (PDOException $e) {
			$this->error = $e->getMessage();
			return false;
		}
	}

	public function q(string $query): PDOStatement|false
	{
		$start = microtime(true);

		try {
			$stmt = $this->c->query($query);
			$this->record($query, $start);
			return $stmt;
		} catch (PDOException $e) {
			$this->error = $e->getMessage();
			return false;
		}
	}

	private function record(string $query, float $start): void
	{
		$time = microtime(true) - $start;
		$this->queries++;
		$this->log[] = [$query, $time];
		$this->time += $time;
	}

	public function error(): string
	{
		return $this->error;
	}

	public function queries(): int
	{
		return $this->queries;
	}

	public function log(): array
	{
		return $this->log;
	}

	public function time(): float
	{
		return $this->time;
	}
}